Measles is a paramyxovirus. Koplik spots are small bright red spots with a white centre on the buccal mucosa that precede the measles rash by 1-2 days and are pathognomonic for measles. Measles present initially with cough, coryza and conjunctivitis then the Koplik spots. Eventually a maculopapular rash develops, beginning at the head/neck and spreading downwards.